CN104115049B - Coat optical fiber, optical-fiber-belt and optical cable - Google Patents
Coat optical fiber, optical-fiber-belt and optical cable Download PDFInfo
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- CN104115049B CN104115049B CN201280069889.8A CN201280069889A CN104115049B CN 104115049 B CN104115049 B CN 104115049B CN 201280069889 A CN201280069889 A CN 201280069889A CN 104115049 B CN104115049 B CN 104115049B
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- optical fiber
- coating layer
- coat
- primary coating
- fiber
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4429—Means specially adapted for strengthening or protecting the cables
- G02B6/44384—Means specially adapted for strengthening or protecting the cables the means comprising water blocking or hydrophobic materials
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02395—Glass optical fibre with a protective coating, e.g. two layer polymer coating deposited directly on a silica cladding surface during fibre manufacture
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4403—Optical cables with ribbon structure
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4403—Optical cables with ribbon structure
- G02B6/4404—Multi-podded
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Abstract
The purpose of the present invention is that a kind of optical fiber cored wire is provided by the construction different from conventional art or method, its make it possible to cored wire under water when reduce the interface leafing between glass fibre and primary coating layer and reduce the increase of transmission loss.Optical fiber cored wire (100) according to an embodiment of the invention is provided with glass fibre (101), the primary coating layer (102) on the periphery coated in glass fibre (101), the secondary coat (103) on the periphery coated in primary coating layer (102) and the dyed layer (104) on the periphery coated in secondary coat (103).According to the optical fiber cored wire (100), when in the hot water that cored wire immerses 60 DEG C up to 200 days, vesicle is produced in a manner of generally uniform in primary coating layer, and as a result, the stress acted on from secondary coat on interface of glass is alleviated and the increase of transmission loss is reduced.
Description
Technical field
The present invention relates to coating optical fiber, optical-fiber-belt and the optical cable with excellent water resistance.
Background technology
With being already installed on extensive region to the demand of high capacity communication, optical fiber recently.It is fine for this optics
The example of the coating optical fiber of dimension includes：Glass fibre；The primary coating layer of coated glass fiber periphery；Coat primary coating
The secondary coat of the periphery of layer；And the dyed layer of the periphery of the secondary coat of coating.
When the coating optical fiber with this structure is dipped into water, when particularly immersing for a long time in hot water,
Know and problems with occurs in some cases.Specifically, bubble is produced in primary coating layer and in glass fibre and once
Interface (interface is also referred to as a glass/time interface) place between coat is peeling-off so that with before being immersed in the water
Transmission loss is compared, transmission loss increase.
In order to solve the problem, various trials have traditionally had been made.For example, patent document 1 discloses by using
Material with the peeling force for being adjusted to predetermined value realizes the big bubble during hot water is immersed as primary coating layer and produced
Suppression and the increased reduction of transmission loss.Here, peeling force is measured as follows.First, glass plate is coated with as coating
The material of the primary coating layer of optical fiber, and be dipped into hot water.Then, measure for 90 degree of angle by the material
The peeling force peeled off from glass plate.
Meanwhile patent document 2 discloses that by the way that the primary coating layer for coating optical fiber and secondary coat are adjusted respectively
Whole realized to predetermined value suppresses and the increased reduction of transmission loss during hot water is immersed caused by big bubble.
Reference listing
Patent document
Patent document 1：Japanese Unexamined Patent Publication No 2004-54138
Patent document 2：Japanese Unexamined Patent Publication No 2008-40369
Patent document 3：Japanese Unexamined Patent Publication No 2010-217800
Non-patent literature
Non-patent literature 1：Charles Aloisio et al.,"Optical Fiber Coating
Delamination Using Model Coating Materials",Proceedings of the 51st IWCS,
2002,pp.738-747
The content of the invention
Patent document 1 discloses：It is used as by using the monomer of such as polypropylene glycol or polytetramethylene glycol and is used for one
Oligomer skeleton constituent component in the material of secondary coat, it can suppress to produce big bubble between hot water mid-term is immersed.Meanwhile
Patent document 2 discloses that：By making the Tg (glass transformation temperature) of primary coating layer be less than the Tg of secondary coat and making once
The thickness of coat is not more than the thickness of secondary coat, can suppress to produce big bubble between hot water mid-term is immersed.As above institute
State, the caused suppression to bubble traditionally needs to suppress the stripping of a glass/time interface and reduces the increasing of transmission loss
Add.
As the result of further investigation, the present inventor's latest find：Formed between hot water mid-term is immersed in primary coating layer
In bubble non-homogeneous (uneven) distribution be interface between glass fibre and primary coating layer stripping and transmission
The reason for increase of loss.For this reason, present invention employs with suppressing to be formed in primary coating layer during being immersed in the water
The different approach of the classical pathway of bubble.Specifically, in the approach used in the present invention, but by allowing be immersed in the water
Period is formed uniformly bubble to improve water resistance in primary coating layer.
It is an object of the invention to provide one kind to coat optical fiber, and the coating optical fiber has excellent water resistance：
By allowing to be formed uniformly bubble in primary coating layer during being immersed in the water, can suppress in glass fibre and once to apply
The stripping of interface between coating, and the increase of transmission loss can be reduced.
An aspect of of the present present invention is a kind of coating optical fiber, including：Optical fiber, the optical fiber include glass fibers
Dimension, primary coating layer and secondary coat, the primary coating layer coat the periphery of the glass fibre, the secondary coat
Coat the periphery of the primary coating layer；And coat, the coat three times coat the periphery of the optical fiber three times,
And the coat three times has 100MPa or higher modulus of elasticity, wherein when the coating optical fiber is dipped into 60 DEG C
Hot water in up to 200 days when, bubble is substantially evenly formed in the inside of the primary coating layer, fine along the coating optics
The number of the bubble is existing for per unit area in the primary coating layer on the cross section of the longitudinal direction interception of dimension
It is one or more, the unit area is defined in the case where the thickness of the primary coating layer is taken as a unit, and
And the bubble has 10 μm or less diameter.
Make it possible to relax stress by bubble according to the coating optical fiber of the present invention, because during being immersed in the water
Bubble is substantially evenly formed in the inside of primary coating layer.Therefore, interface between glass fibre and primary coating layer
Stripping can be suppressed, and the increase of transmission loss can be reduced.
Brief description of the drawings
Fig. 1 is the schematic diagram of coating optical fiber according to an embodiment of the invention.
Fig. 2 is the schematic diagram of optical-fiber-belt according to an embodiment of the invention.
Fig. 3 is the schematic diagram of optical fiber cable according to an embodiment of the invention.
Fig. 4 is the curve for showing load and the relation between glass fibre leaves the time of primary coating layer cost
Figure.
Fig. 5 is the schematic diagram for carrying out the loading test set of load testing.
Embodiment
Below, embodiments of the present invention will be described by referring to the drawings.However, the invention is not restricted to these embodiments.Pay attention to, under
In the accompanying drawing of face description, the element with identical function is presented with like reference characters, and its repeated description is in some situations
In be omitted.
(embodiment)
Fig. 1 shows the schematic diagram of the coating optical fiber 100 according to the present invention.Specifically, coating optical fiber 100 wraps
Include：The primary coating of optical fiber 100a, optical fiber 100a including glass fibre 101, the periphery of coated glass fiber 101
Layer 102, coating primary coating layer 102 periphery secondary coat 103；And dyed layer 104, the dyed layer 104 coating light
Learn fiber 100a periphery.
Each in primary coating layer 102, secondary coat 103 and dyed layer 104 is predetermined by being adjusted to have
The coating material of characteristic is made.For the coating material for each layer in the layer, usually using ultraviolet-curing
Resin.Ultraviolet curing resin includes at least oligomer, diluent monomer and Photoepolymerizationinitiater initiater, and also include additive
Such as silane coupler and chain-transferring agent, for adjusting various performances.
Here, it is expected that the coating material of the layer is adjusted so that primary coating layer 102 there can be low elastic modulus
And secondary coat 103 can have high elastic modulus.In this case, primary coating layer 102 is used as soft cushion, and
Secondary coat 103 plays a part of hard protective layer.Therefore, or even when applying external force to optical fiber 100a, can also press down
The increase of transmission loss processed.Specifically, in order to maintain to play a part of optical fiber, the modulus of elasticity of primary coating layer 102 is excellent
Selection of land is 0.2 to 3MPa, and the modulus of elasticity of secondary coat 103 is preferably 500 to 1200MPa, and the bullet of dyed layer 104
Property modulus is preferably 100 to 2000MPa.
Dyestuff or pigment colouring of the coating material for dyed layer 104 with visibility.However, dyed layer 104 is not
It is to be colored, and coat etc. is also acceptable three times for keeping the non-staining of intensity.
Recently, wherein coloured to primary coating layer 102 or secondary coat 103 with dyestuff or pigment and do not had to reduce cost
The coating optical fiber for being provided with the type of dyed layer 104 is popularized.There is such double-layer structure in coating optical fiber
Situation in, for by arrange in parallel to each other coating optical fiber and by coating optical fiber coat together to form optics
The band coat of fiber band serves as coat three times.
When the hard coat that the modulus of elasticity with 100MPa or higher on optical fiber 100a periphery be present, such as
Dyed layer or during with coat, the movement of secondary coat is restricted, and act on glass fibre and primary coating layer it
Between interface stress increase, become more likely to occur so as to interface peel.In addition, when coating optical fiber is soaked for a long time
When entering in the hot water, water can be gathered in the released part between glass fibre and primary coating layer.Therefore, it ought particularly apply firmly
Coating, such as dyed layer or when being present in coat on the outside of secondary coat, between glass fibre and primary coating layer
The problem of stripping and transmission loss increase of interface, tends to be significantly raised.Therefore, wherein the elasticity with 100MPa or higher
The coat three times of modulus coats prerequisite of the structure for the present invention of the periphery of secondary coat.
Pay attention to, the soluble constituent in coat is dissolved into the stripping portion being gathered between glass fibre and primary coating layer
In water in point, to form the aqueous solution.If dyed layer on the outside of secondary coat be present, dyed layer serves as semipermeable membrane.By
The difference of the concentration between water on the outside of the aqueous solution and dyed layer in splitting part generates osmotic pressure, and
Water is moved to splitting part due to osmotic pressure.As a result, splitting can grow up.
Therefore, especially, in the coating optical fiber with dyed layer, transmission loss can substantially increase.
In this embodiment, typical values are used for the size of each layer in the layer.Specifically, glass fibre
101 have 90 to 150 μm and preferably from about 125 μm of a diameter, each in primary coating layer 102 and secondary coat 103
10 to 60 μm and preferably 20 to 50 μm of thickness are respectively provided with, and dyed layer 104 has 5 to 20 μm of thickness.The chi of these layers
It is very little to be not limited to these values, and any value can be changed over.
Multiple coating optical fibers 100 can be integrally into belt shape.Fig. 2 shows the optical-fiber-belt with this structure
200 schematic diagram.Optical-fiber-belt 200 has the outer application of four coating optical fibers 100 wherein arranged parallel to each other
There is the structure with coat 201.From the perspective of intensity holding etc., preferably have 100 with coat 201 to 200MPa's
Modulus of elasticity.The size of optical-fiber-belt 200 is about 320 μm of thickness and about 1.1mm width.The chi of optical-fiber-belt 200
It is very little and coating optical fiber 100 in a unlimited number in these values, and any value can be changed over.
Pay attention to, coating optical fiber 100 can be replaced to form optical-fiber-belt 200 using optical fiber 100a.At this
In kind situation, optical-fiber-belt 200 has a structure in which, wherein the outside of optical fiber 100a secondary coat 103 applies
It is covered with the band coat 201 for serving as coat three times.
Furthermore, it is possible to by the way that multiple optical-fiber-belts 200 are contained in slit to form optical fiber cable.Fig. 3 is shown
The schematic diagram of optical fiber cable 300 with this structure.Optical fiber cable 300 is, for example, the SZ cables for including 40 fibers.Light
Learning fiber cable 300 includes the sept 301 with five SZ slits 302.Accommodated in each SZ slit in SZ slits 302
Two optical-fiber-belts 200.Compress and wrap 303 is wound around sept 301, and the outside of the compression and wrap 303
Covered by sheath 304.In addition, the centre in the cross section of sept 301 is provided with tensioning member 305.In sept 301
Periphery be provided with trace labelling 306.Compressing drag-line 307 is provided with a part for the periphery of wrap 303.
SZ slits 302 are not limited to the type of five grooves, and can be with the number of suitably selected groove.In addition, each
Optical-fiber-belt 200 in individual SZ slits 302 it is in a unlimited number in two, but can be with suitably selected.Furthermore it is possible to instead of
SZ slits use S slits.
(method for being used to measure modulus of elasticity)
Using index of the modulus of elasticity (also referred to as Young's modulus) as the hardness of each coat in coat.
After manufacturing optical fiber, modulus of elasticity is measured to each coat.Well-known approach can be used to be used as to be used to measure
The concrete ways of modulus of elasticity.
(method for being used for measuring limit adhesion strength)
Limit adhesion strength is the viscous of interface of the instruction in heat and wet environment between glass fibre and primary coating layer
The index of attached intensity.Limit adhesion strength is defined as follows.Pay attention to, the definition of limit adhesion strength is based in patent document 3
Description.
Prepare its coat and the coating optical fiber being scored on all-round is in the position away from end 10mm, while only
Glass fibre retains intact.Then, in region of the scope from the end of coating optical fiber to the position away from end 10mm
In coat sand paper is fixed to by adhesive.Sand paper is fixed in the air that temperature is 60 DEG C and humidity is 98%RH,
The end for coating optical fiber simultaneously is located on upside.Weight is attached to the other end of coating optical fiber afterwards.
Therefore, constant bear is applied with the part for the length for extending 10mm above indentation between glass fibre and primary coating layer
Carry.In this state, measure until glass fibre leaves the time that primary coating layer spent.Then, gradually change and apply
To the load of glass fibre, i.e. the quality of weight, and find load and the pass between glass fibre leaves the time of cost
System.
Fig. 4 shows the example of the typical measurement result of limit adhesion strength.Fig. 4 is shown as example to help to understand pole
Limit the curve map of the definition of adhesion strength.Thus, it should be noted that the specific example of the performed embodiment is not shown in Fig. 4
As a result the concrete numerical value and on vertical pivot and trunnion axis is omitted.Based on Fig. 4, with being applied to glass fibre and primary coating layer
Between load reduce, until glass fibre leaves the time increase that primary coating layer spent.However, when load reaches load
C or more hour, until glass fibre leaves the increase suddenly of spent time and slope change mitigation.Turning point D be present, turning
At break D, until glass fibre leaves increase suddenly and the slope change mitigation as described above of spent time.Slow down in slope
Load C at the turning point D of sum is defined as limit adhesion strength.Patent document 3 shows that limit adhesion strength is higher, is soaking
The increase of transmission loss is just reduced more after entering in hot water.
(measurement D50 and T50 method)
In this manual, the stripping in a glass/time interface is referred to as leafing, and in the inside of primary coating layer
Tear or the vacuolization in primary coating layer be referred to as tearing.The susceptibility of leafing and the susceptibility of tear can be speculatively
It is related to the susceptibility that the susceptibility and bubble of the stripping of a glass/time interface are formed.As leafing susceptibility and tear quick
The quantitative target of sensitivity, D50 and T50 are defined respectively as.
Fig. 5 is shown as the schematic diagram of the loading test set 900 of the example of the equipment for measuring leafing and tear.Should
Loading test set 900 includes：Workbench 901, coating optical fiber 100 to be measured are installed on the workbench 901；
Load unit 902, the load unit 902 set away from workbench 901 and can adjust load value；Bar 903, the bar 903 by
Load unit 902 is fixed on the side of workbench 901；And driver element 904, the driver element 904 can make load unit 902
Moved with bar 903 on the normal direction A of workbench 901.Bar 903 is arranged to hang down in the state of workbench 901 is installed in
Directly in the longitudinal direction for coating optical fiber 100 and parallel to the surface of workbench 901.
When driver element 904 discharges load unit 902, load unit 902 and bar 903 lean on the weight direction of their own
Workbench 901 moves.Bar 903 and workbench 901 are clipped in the middle optical fiber 100 is coated, and load unit 902 is to coating
Point B on optical fiber 100 applies load.Hereafter, after the scheduled time has passed, driver element 904 is away from coating
The side of optical fiber 100 moves the load up unit 902 and bar 903, and load unit 902 is no longer to coating optical fiber
100 apply load.
Pay attention to, loading the beginning and end of application can manually be controlled or can be by setting control unit by user
Automatically carry out.Measuring apparatus is not limited to the measuring apparatus of the device structure with Fig. 5, as long as can be perpendicular to coating optics
On the direction of the longitudinal direction of fiber the predetermined load scheduled time is applied to the point B of coating optical fiber 100.
In order to measure, coating optical fiber 100 to be measured is fixed to loading test set 900.Then,
Predetermined load is applied to and a little continues 4.5 seconds, and load is repeatedly further applied to 30 points with about 6mm interval.Hereafter,
The leafing or the existence or non-existence of tear that each is put using observation by light microscope.In addition, increase load, and exist every time
Pair 30 points different from the point in previous observation are repeated during increase load to apply load and observe these points.Based on this, send out
Generating layer from or tear load value and point number drawn relative to each other.Pay attention to, the point for being applied in load is not limited to 30.
Cause be applied in load a little in 50% or more point at observe leafing or the minimal negative of tear
Load is defined as D50 or T50.In other words, in the graph, 50% (15 in 30 points of load are applied in are caused
Point) or more observe that the minimum load of leafing is defined as D50 at point.Meanwhile in the graph, cause be applied in it is negative
Observe that the minimum load of tear is defined as D50 at 50% (15 points) in 30 points carried or more point.
It can be seen that less D50 represents to need less load to cause leafing, i.e. less D50 represents higher
Leafing susceptibility.Equally, it can be seen that, less T50 represents to need less load to cause tear, i.e. less T50 tables
Show higher tear susceptibility.Therefore, D5 and T50 can be used separately as leafing and the sensitivity indexes of tear.
Pay attention to, these measuring methods are based on the method described in non-patent literature 1.
(sample adjustment)
Traditionally, the generation of the bubble during itself being immersed in the water in primary coating layer has been considered to transmission damage
The reason for increase of consumption, as indicated in patent document 1 and 2.Meanwhile the present inventor has been furtherd investigate, and therefore
Through latest find, the non-uniform Distribution of the bubble formed during water is immersed in primary coating layer is in glass fibre and once
The reason for stripping of interface between coat and the increase of transmission loss.
It is contemplated that no in primary coating layer during water is immersed it ought be formed or not be formed uniformly bubble
When, peel off and easily occur, because the stress from secondary coat is directly transferred to a glass/time interface or to concentrate
Mode is delivered in some regions.On the other hand, it is contemplated that, when during water is immersed in primary coating layer adequate relief
During into bubble, the stress from secondary coat is relaxed by the bubble being evenly distributed so that the stripping of a glass/time interface
From suppressed.
Therefore, when the material of coating optical fiber is adjusted so that bubble can be formed uniformly in primary coating layer
When, power is uniformly applied to a glass/time interface, and therefore can be immersed in the water water caused by period not reducing
The suppression of stripping and the reduction of transmission loss are realized in the case of the number of bubble.
To enable being formed uniformly bubble in primary coating layer between hot water mid-term is immersed, adjust as follows each
The material of individual coat.
The inventors have discovered that：By making tear more likely occur than leafing, once applied between hot water mid-term is immersed
Bubble is formed uniformly in coating, so as to reduce the increase of transmission loss.When tear more likely occurs than leafing, sentence is changed
Talk about, when D50 is bigger than T50, during hot water is immersed, the stress from secondary coat causes once applying before leafing
Coating is internally formed bubble.As the result of this point, stress speculatively can be relaxed by bubble, enabling reduce and pass
The increase of defeated loss.
In order that the possibility that leafing occurs is smaller (increasing D50), by reducing the modulus of elasticity of primary coating layer simultaneously
Increase the modulus of elasticity of secondary coat and be delivered to the external force at a glass/time interface to relax.Alternately, for example, by one
The additive of the material addition such as silane coupler of secondary coat increases between primary coating layer and the surface of glass fibre
Adhesion strength.
In order that the possibility that tear occurs is bigger (that is, reducing T50), the modulus of elasticity of primary coating layer is reduced, i.e. one
The crosslink density of secondary coat is reduced.
In addition, in order that bubble is evenly distributed in primary coating layer, can be by using such as polytetramethylene two
The hydrophobic oligomers of alcohol (PTMG) prevent that bubble is formed locally as the material for primary coating layer, and can pass through
The hydrophilic monomer for adding such as acrylamide adjusts water absorbability.
Therefore, can be taken by the adjustment D50 and T50 that carry out in an integrated fashion to the material for coat pre-
Definite value and enable bubble to the hydrophobic substance in the material for primary coating layer and the adjustment of the mixing ratio of hydrophilic substance
Enough it is uniformly distributed, is immersing between hot water mid-term the coating optics that bubble is formed uniformly in primary coating layer so as to obtain
Fiber.
(example)
Prepared example 1 to 4 and comparative example 1 to 3, they be have the structure shown in Fig. 2 optical-fiber-belt and it
In the attribute of coat be changed.Coating optical fiber is taken out from optical-fiber-belt, and measures above-mentioned modulus of elasticity
D50, T50 and limit adhesion strength.In addition, measurement transmission loss is brought by using optical fiber before hot water is immersed.
In addition, 200 days in example and the hot water of 60 DEG C of comparative example immersion, and then observe bubble and measure transmission loss.
Table 1 shows the result of carried out measurement and observation.
[table 1]
For caused by the leafing of a glass/time interface presence or absence of, the number of bubble (microvesicle) and bubble
Size, it is immersed in the example of 200 days and comparative example in 60 DEG C of hot water to each with light microscope and is observed.
Specifically, after immersing in hot water, about 10cm block is cut out from coating optical fiber.Then, observe with about
3cm is three points (3cm, 6cm and 9cm) of the end of the remote coating optical fiber at interval.Further, make coating optics fine
Dimension is rotated by 90 ° in the circumferential direction of cross section, and observes three points again.It is every in six above-mentioned points of observation
In one, on the vertical direction of the longitudinal direction with coating optical fiber, 30 μ in primary coating layer in a thickness direction
(because the thickness of primary coating layer is 30 μm, the region is referred to as once for m and 30 μm of region in a longitudinal direction
The thickness of coat is taken as the unit area defined in the case of a unit) in observation and measurement leafing caused by exist or
It is not present and the number and size of bubble.Whether the measurement permits a determination that bubble not only in the longitudinal direction of coating optical fiber
Direction and it is formed uniformly into the circumferential direction of cross section.
On the existence or non-existence of leafing, if occur at any one in six points of observation glass/
One or more leafing of interface, it is determined that leafing be present, without delamination occurs, it is determined that not deposit
In leafing.
The maximum number of microvesicle represents the maximum number of the bubble among those of six given viewpoints observation.Together
When, the minimal amount of microvesicle represents the minimal amount of the bubble among those of six given viewpoints observation.In bubble
Number more than 10 situation in, maximum number is expressed as " ＞ 10 ".
The maximum gauge of microvesicle represents the diameter of the maximum bubble in six points of observation.Pay attention to, when bubble has
During elliptical shape, it is used as the diameter of bubble by the ultimate range at bubble center.It is maximum when the diameter of bubble is more than 10 μm
Diameter is expressed as " ＞ 10 ".
The transmission loss of each in example and comparative example are measured before and after immersing in hot water.Transmission loss
Increase is in the transmission loss measured by using the coating optical fiber in 60 DEG C of hot water is immersed after 200 days and passed through
The increment of transmission loss between the transmission loss measured using the coating optical fiber before hot water is immersed.Passed to measure
Defeated loss, use the light that wavelength is 1.55 μm.
Generally, the increase of transmission loss is considered as acceptable in practice significance less than 0.1dB/km.For this reason,
If increase is 0.1dB/km or more, water resistance is assessed as being insufficient (assessment is by × expression)；If increase is small
In 0.1dB/km, then water resistance is assessed as being enough (assessment is represented by zero)；And in addition, if increase is less than
0.07dB/km, then water resistance be assessed as being excellent (assessment is represented by ◎).
The result shown from table 1, it can be seen that the increase of transmission loss is producing the situation of one or more bubbles
(example 1 to 4) is more more than being reduced in the situation (comparative example 1 and 2) of no generation bubble.In addition, do not forming the feelings of bubble
In shape (comparative example 1), it was further observed that produce leafing.
In addition, in the situation for producing one or more bubbles, the increase of transmission loss is in the maximum gauge of bubble
Than being reduced in situation (comparative example 3) of the maximum gauge of bubble more than 10 μm in (example 1 to 4) in 10 μm or smaller of situation
More.
The fact that from the observed all points at least one bubble of generation, it can be seen that bubble is substantially evenly formed
In primary coating layer.Therefore it is proposed to from secondary coat to the stress at a glass/time interface by immersing 60
DEG C hot water in substantially evenly produce vesicle during 200 days in primary coating layer and be alleviated so that transmission loss
Increase is reduced.Specifically, when bubble is substantially evenly formed in primary coating layer, the size of bubble is 10 μm or smaller
Diameter, and the number of bubble is existing for the per unit area on the cross section of the longitudinal direction interception along primary coating layer
When one or more, the increase of transmission loss is reduced.By by the thickness of primary coating layer as a unit, the list
Plane product be defined as equal to primary coating layer thickness square area.
In addition, from the result shown in table 1 it can be seen that the increase of transmission loss D50 more than T50 situation (example 1 to
4) reduced in.On the other hand, the increase of transmission loss increases in situations (comparative example 3) of the T50 less than 200g.This can be speculatively
Be because：Too small T50 more likely to form bubble in primary coating layer, and bubble is assembled to form larger water
Bubble so that stress is anisotropically applied to a glass/time interface, causes the increase of transmission loss.For this reason, more preferably
It is：D50 is 500g or higher, and T50 is 200g or higher.
Claims (6)
1. one kind coating optical fiber, including：
Optical fiber, the optical fiber include glass fibre, primary coating layer and secondary coat, and the primary coating layer applies
The periphery of the glass fibre is covered, the secondary coat coats the periphery of the primary coating layer；And
Coat three times, the coat three times coats the periphery of the optical fiber, and the coat three times has
100MPa or higher modulus of elasticity, wherein
When the coating optical fiber was dipped into 60 DEG C of hot water up to 200 days, in the inside of the primary coating layer substantially
It is formed uniformly bubble,
At three points of the longitudinal direction along the coating optical fiber using about 3cm as interval, making, the coating optics is fine
Before and after dimension is rotated by 90 ° in the circumferential direction of the cross section vertical with the longitudinal direction, when in six points of observation
Each point of observation in observe it is described coating optical fiber the primary coating layer when, in institute in six points of observation
The minimal amount for stating the bubble existing for per unit area in primary coating layer is one or more, and at described six
The maximum number of the bubble existing for per unit area is eight or more in the primary coating layer in point of observation,
The thickness of the primary coating layer is taken as defining the unit area in the case of a unit, and
The diameter of maximum bubble in six points of observation is 10 μm or smaller,
Each in the primary coating layer, the secondary coat and the coat three times is by ultraviolet curing resin
It is made, the ultraviolet curing resin includes oligomer, diluent monomer, Photoepolymerizationinitiater initiater and additive, the addition
Agent includes silane coupler,
The modulus of elasticity of the primary coating layer is 0.2MPa to 0.7MPa, and the modulus of elasticity of the secondary coat is
500MPa to 1200MPa,
When being applied to the optical fiber on the direction vertical with the longitudinal direction of the optical fiber with 50% it is general
It is described when being applied on the direction vertical with the longitudinal direction of the optical fiber that rate causes the first load of leafing to be more than
Cause tear during optical fiber with 50% probability second loads, and
First load is 500g or bigger, and second load is 200g or bigger.
2. coating optical fiber according to claim 1, wherein
The coat three times is dyed layer.
3. a kind of optical-fiber-belt, including：
Multiple coating optical fibers according to claim 2, the coating optical fiber are arranged parallel to each other and by one
Play coating.
4. a kind of optical fiber cable, including：
Multiple optical-fiber-belts according to claim 3, the optical-fiber-belt overlie one another；And
Slit, the optical-fiber-belt are accommodated in the slit.
5. a kind of optical-fiber-belt, including：
Multiple optical fibers, each optical fiber in the multiple optical fiber include glass fibre, primary coating layer
With secondary coat, the primary coating layer coats the periphery of the glass fibre, described in the secondary coat coating once
The periphery of coat, and the multiple optical fiber is arranged parallel to each other；And
As the band coat of coat three times, the modulus of elasticity with coat with 100MPa or higher, and it is described
Band coat coats the optical fiber together, wherein
It is substantially equal in the inside of the primary coating layer when in the hot water that the optical-fiber-belt is dipped into 60 DEG C up to 200 days
Bubble is formed evenly,
At three points of the longitudinal direction using about 3cm as interval of an optical fiber along in the multiple optical fiber,
Make one optical fiber in the multiple optical fiber in the circumferential direction of the cross section vertical with the longitudinal direction
On be rotated by 90 ° before and after, observed when in each point of observation in six points of observation in the multiple optical fiber
During the primary coating layer of one optical fiber, in six points of observation in the primary coating layer per unit
The minimal amount of the bubble is one or more existing for area, and is once applied described in six points of observation
The maximum number of the bubble existing for per unit area is eight or more in coating, in the thickness of the primary coating layer
It is taken as defining the unit area in the case of a unit, and
The diameter of maximum bubble in six points of observation is 10 μm or smaller,
Each in the primary coating layer, the secondary coat and the coat three times is by ultraviolet curing resin
It is made, the ultraviolet curing resin includes oligomer, diluent monomer, Photoepolymerizationinitiater initiater and additive, the addition
Agent includes silane coupler,
The modulus of elasticity of the primary coating layer is 0.2MPa to 0.7MPa, and the modulus of elasticity of the secondary coat is
500MPa to 1200MPa,
When being applied to the optical fiber on the direction vertical with the longitudinal direction of the optical fiber with 50% it is general
It is described when being applied on the direction vertical with the longitudinal direction of the optical fiber that rate causes the first load of leafing to be more than
Cause tear during optical fiber with 50% probability second loads, and
First load is 500g or bigger, and second load is 200g or bigger.
6. a kind of optical fiber cable, including：
Multiple optical-fiber-belts according to claim 5, the optical-fiber-belt overlie one another；And
Slit, the optical-fiber-belt are accommodated in the slit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-033088 | 2012-02-17 | ||
| JP2012033088A JP5465741B2 (en) | 2012-02-17 | 2012-02-17 | Optical fiber core, optical fiber tape core and optical cable |
| PCT/JP2012/008037 WO2013121494A1 (en) | 2012-02-17 | 2012-12-17 | Optical fiber core wire, optical fiber tape core wire, and optical cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104115049A CN104115049A (en) | 2014-10-22 |
| CN104115049B true CN104115049B (en) | 2018-01-02 |
Family
ID=48983663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280069889.8A Expired - Fee Related CN104115049B (en) | 2012-02-17 | 2012-12-17 | Coat optical fiber, optical-fiber-belt and optical cable |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US9846292B2 (en) |
| EP (1) | EP2816384A4 (en) |
| JP (1) | JP5465741B2 (en) |
| CN (1) | CN104115049B (en) |
| BR (1) | BR112014019240A8 (en) |
| IN (1) | IN2014CN04882A (en) |
| WO (1) | WO2013121494A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6569429B2 (en) * | 2015-09-25 | 2019-09-04 | 住友電気工業株式会社 | Optical fiber ribbon |
| WO2018062364A1 (en) | 2016-09-30 | 2018-04-05 | 株式会社フジクラ | Optical fiber colored core, optical fiber cable, and method for manufacturing optical fiber colored core |
| EP3521884B1 (en) * | 2016-09-30 | 2023-01-18 | Fujikura Ltd. | Optical fiber ribbon, optical fiber cable, and method for manufacturing optical fiber ribbon |
| US10451795B2 (en) * | 2017-11-16 | 2019-10-22 | Ofs Fitel, Llc | Optical fiber for applications requiring high system optical signal-to-noise ratio performance and low degradation from nonlinear impairments |
| US11249272B2 (en) * | 2018-01-10 | 2022-02-15 | Sumitomo Electric Industries, Ltd. | Optical fiber cable and manufacturing method of optical fiber cable |
| US20230236356A1 (en) * | 2022-01-25 | 2023-07-27 | Corning Research & Development Corporation | Single-mode optical fiber with dyed thin coating |
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- 2012-12-17 WO PCT/JP2012/008037 patent/WO2013121494A1/en active Application Filing
- 2012-12-17 CN CN201280069889.8A patent/CN104115049B/en not_active Expired - Fee Related
- 2012-12-17 IN IN4882CHN2014 patent/IN2014CN04882A/en unknown
- 2012-12-17 EP EP12868568.2A patent/EP2816384A4/en not_active Withdrawn
- 2012-12-17 BR BR112014019240A patent/BR112014019240A8/en not_active Application Discontinuation
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2014
- 2014-06-04 US US14/296,003 patent/US9846292B2/en not_active Expired - Fee Related
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| JP2004212722A (en) * | 2003-01-06 | 2004-07-29 | Fuji Photo Film Co Ltd | Optical member, polymerizable composition used for manufacture of same and method of manufacturing the same and optical communication system using same |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP2816384A1 (en) | 2014-12-24 |
| BR112014019240A2 (en) | 2017-06-20 |
| WO2013121494A1 (en) | 2013-08-22 |
| EP2816384A4 (en) | 2015-11-11 |
| JP2013171072A (en) | 2013-09-02 |
| US20150293325A1 (en) | 2015-10-15 |
| US9846292B2 (en) | 2017-12-19 |
| IN2014CN04882A (en) | 2015-09-18 |
| JP5465741B2 (en) | 2014-04-09 |
| BR112014019240A8 (en) | 2017-07-11 |
| CN104115049A (en) | 2014-10-22 |
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